<p>could someone help me with this blue book problem</p>
<p>its on functions, thank you so much</p>
<p>Its not that hard
You should be able to tell that I is true right of the back a is the same thing as the x value and X has to be less than 4.
For II, just look at the graph. At about 3.5 (the a value) the y value is 4 (the b value). This rules out II
Now for III, gotta love this one.
Ok pick any ordered set. Any one. I will pick (2,1). a = 2 b = 1
Now what is f(2)? You should be able to tell its about 2.5. Now just look. Whenver a = 2 b will always HAVE to be 2.5 or less. This works for all values of the graph. And there you go for your answer.</p>
<p>thanks gyros, im pretty bad with functions so do you think you could explain number 8 on page 369, it may be easy to you but at this moment it isnt for me. thank you so much.</p>
<p>Ok this one is a bit confusing but it is nothing THAT special :D. it says F(x+5) = F(x). What this means is that for every 5 values of x Y will be the same (i.e. if x = 1 then F(6) = F(1).)
Now find how many times F(X) = 0
it does it at about 1.3, 2.3, 3, and 4.5
Since it repeats every time after 5 X vaules ( F(6.3) = F (1.3).)
So you can do this at 8 points (1.3, 2.3, 3, 4.5, 6.3, 7.3, 8, 9.5)
However look at 6.3... you can add five more to it because the range of your function is the numbers from 0 to 12. So F (11.3) = F(6.3). This gives you 9 total times that F(X) = 0.
note F(x) is the same thing as Y.
It's asking when does Y = 0 basically.</p>
<p>thank you so much gyros</p>
<p>oh yea i was just wondering but what did you get on the SAT math?</p>